Furnace-grate



M. T. DAVIS, JR. FURNACE GRATE. APPLICATION FILED 05c. 27, 1918.

Patented Aug. 24, 1920,

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WITNESSES W'Awwe M. T. DAVIS, JR.

FURNACE GRATE. APPLICATION FILED DEC-27. I918.

l/IVE/VTOR ATTORNEYS Patented Aug. 24, 1920.

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M. T. DAVIS, JR. FURNACE GRATE. APPLICATION FILED DEC. 27, 1918.

Patented Aug. 24, 1920.

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Ml VE/V T 0H 5 JlIadLJU L T avagair A rromvsys UNITED STATES PATENT OFFICE.

MADISON THENTON DAVIS, JR., 015 CHARLESTON, WEST VIRGINIA, ASSIGNOR TO KANAWHA MANUFACTURING CO1VIPANY, OF CHARLESTON, WEST VIRGINIA, A

CORPORATION OF WEST VIRGINIA.

FURNACE- GRATE.

Specification of Letters Patent.

Patented Aug. 24, 1920.

Application filed December 27, 1918. Serial No. 268,519.

To all whom it may concern:

Be it known that I, MADISON THEN'roN DAVIS, J12, a citizen of the United States, and a resident of Charleston, in the county of Kanawha and State of WVest Virginia, have invented certain new and useful Improvements in F urnace-Grrates, of which the following is a specification.

My invention relates to improvements in furnace grates, and it consists in the constructions, combinations and arrangements herein described and claimed.

An object of my invention is to provide a sectional grate for furnaces, provision be ing made in each of the sections for the circulation of water so that the heating area of the furnace is greatly increased.

Other objects and advantages will appear in the following specification, reference being had to the accompanying drawings in which Figure 1 is a side elevation of a furnace having the improved section of grate embodied therein,

Fig. 2 is a detail view of one of the end sections,

Fig. 3 is a cross sectional view of the furnace illustrating more particularly the shape of one of the grate sections,

Fig. 41 is a plan view of the grate,

Fig. 5 is a perspective view showing one of the end and intermediate sections,

Fig. 6 is a cross section on the line 6-6 of Fig. 2, and

Figs. 7 8, and 9 are detail views showing slight modifications in the shape of the ash openings.

This invention relates more particularly to an improvement on the furnace or boiler disclosed in the patent granted to John B. Bernhard, 1,082,996, December 30, 1913.

The improved grate consists of substantially rectangular end sections 1 and any desired number of intermediate sections 2. Both the sections 1 and 2 are made hollow as shown, so that water entering through the pipe 3 in Fig. 1, may circulate through the sections and contribute largely to the heating of the water in the boiler 4.

It is to be observed that the intermediate sections 2 are of a peculiar formation. Each section consists of a vertical branch 5, to the bottom of which the inclined branch 6 is connected. This disposition of each branch 6 and consequently the bottom of the furnace, provides a considerably larger fire chamber and a sufliciently large ash pit.

Ashes drop through the grate by means of the openings 7. In Fig. 41, these openings are formed by depressing one side of each section so that when the depression faces the plane surface of the adjacent section, the ash opening is formed. These openings may be supplemented by openings of other shapes as shown in Figs. 7 8, and 9. These are for the purpose of permitting more air to flow through and also to provide more room for the ashes to drop into the ash pit.

Obviously these openings may be made in any desired manner and shape. The uppermost part of the branch 6 terminates in a foot 8 that rests on the stay bolt 9 and thus offers a support in addition to the nipples 10 by means of which the various sections are fastened together.

These nipples 10 are pressed in place in the flanges 11 of companion sections. Other stay bolts 12 at the back, assist in holding them together. The end sections 1 have recesses that provide flanges 13 to which the front plate 14: of the furnace and ash pit is secured.

WVhile the construction and arrangement of the improved grate is that ofv a generally preferred form, obviously modifications and changes may be made without departing from the spirit of the invention or the scope of the claim.

I claim:

In a furnace, a grate consisting of hollow end sections with depressions to form flanges, a front plate secured to said flanges and covering the ash pit, a plurality of intermediate sections consisting of vertical hollow rear branches and forwardly and upwardly inclined bottom branches, said bottom branches having depressions on one side to form ash openings when the sections are fitted together, nipples securing the various sections together and affording water communication therebetween, a foot formed on the upper end of each bottom section, and stay bolts passing through portions of all of the sections, one of the stay bolts passing beneath the feet and offering additional support.

MADISON THENTON DAVIS, JR. 

